81092536853280 has 96 divisors (see below), whose sum is σ = 257391426333888. Its totient is φ = 21459602611200.

The previous prime is 81092536853267. The next prime is 81092536853281. The reversal of 81092536853280 is 8235863529018.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (81092536853281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644756911 + ... + 644882670.

It is an arithmetic number, because the mean of its divisors is an integer number (2681160690978).

Almost surely, 2^{81092536853280} is an apocalyptic number.

81092536853280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81092536853280 is an abundant number, since it is smaller than the sum of its proper divisors (176298889480608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81092536853280 is a wasteful number, since it uses less digits than its factorization.

81092536853280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289639730 (or 1289639722 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 60.

The spelling of 81092536853280 in words is "eighty-one trillion, ninety-two billion, five hundred thirty-six million, eight hundred fifty-three thousand, two hundred eighty".